File: /home/mmickelson/trac_theflexguy_com_trac/build/lib/trac/web/chrome.py
# -*- coding: utf-8 -*-
#
# Copyright (C) 2005-2009 Edgewall Software
# Copyright (C) 2005-2006 Christopher Lenz <cmlenz@gmx.de>
# All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://trac.edgewall.org/wiki/TracLicense.
#
# This software consists of voluntary contributions made by many
# individuals. For the exact contribution history, see the revision
# history and logs, available at http://trac.edgewall.org/log/.
#
# Author: Christopher Lenz <cmlenz@gmx.de>
import datetime
import os
import pkg_resources
import pprint
import re
try:
from cStringIO import StringIO as cStringIO
except ImportError:
cStringIO = StringIO
from genshi import Markup
from genshi.builder import tag, Element
from genshi.input import HTML, ParseError
from genshi.core import Attrs, START
from genshi.output import DocType
from genshi.template import TemplateLoader, MarkupTemplate, TextTemplate
from trac import __version__ as VERSION
from trac.config import *
from trac.core import *
from trac.env import IEnvironmentSetupParticipant
from trac.mimeview import get_mimetype, Context
from trac.resource import *
from trac.util import compat, get_reporter_id, presentation, get_pkginfo, \
get_module_path, translation
from trac.util.compat import partial, set
from trac.util.html import plaintext
from trac.util.text import pretty_size, obfuscate_email_address, \
shorten_line, unicode_quote_plus, to_unicode, \
javascript_quote
from trac.util.datefmt import pretty_timedelta, format_datetime, format_date, \
format_time, http_date, utc
from trac.util.translation import _
from trac.web.api import IRequestHandler, ITemplateStreamFilter, HTTPNotFound
from trac.web.href import Href
from trac.wiki import IWikiSyntaxProvider
from trac.wiki.formatter import format_to, format_to_html, format_to_oneliner
def add_link(req, rel, href, title=None, mimetype=None, classname=None):
"""Add a link to the chrome info that will be inserted as <link> element in
the <head> of the generated HTML
"""
linkid = '%s:%s' % (rel, href)
linkset = req.chrome.setdefault('linkset', set())
if linkid in linkset:
return # Already added that link
link = {'href': href, 'title': title, 'type': mimetype, 'class': classname}
links = req.chrome.setdefault('links', {})
links.setdefault(rel, []).append(link)
linkset.add(linkid)
def add_stylesheet(req, filename, mimetype='text/css'):
"""Add a link to a style sheet to the chrome info so that it gets included
in the generated HTML page.
If the filename is absolute (i.e. starts with a slash), the generated link
will be based off the application root path. If it is relative, the link
will be based off the `/chrome/` path.
"""
if filename.startswith('common/') and 'htdocs_location' in req.chrome:
href = Href(req.chrome['htdocs_location'])
filename = filename[7:]
else:
href = req.href
if not filename.startswith('/'):
href = href.chrome
add_link(req, 'stylesheet', href(filename), mimetype=mimetype)
def add_script(req, filename, mimetype='text/javascript'):
"""Add a reference to an external javascript file to the template.
If the filename is absolute (i.e. starts with a slash), the generated link
will be based off the application root path. If it is relative, the link
will be based off the `/chrome/` path.
"""
scriptset = req.chrome.setdefault('scriptset', set())
if filename in scriptset:
return False # Already added that script
if filename.startswith('common/') and 'htdocs_location' in req.chrome:
href = Href(req.chrome['htdocs_location'])
path = filename[7:]
else:
href = req.href
if not filename.startswith('/'):
href = href.chrome
path = filename
script = {'href': href(path), 'type': mimetype}
req.chrome.setdefault('scripts', []).append(script)
scriptset.add(filename)
def add_javascript(req, filename):
"""Deprecated: use `add_script()` instead."""
add_script(req, filename, mimetype='text/javascript')
def add_warning(req, msg, *args):
"""Add a non-fatal warning to the request object.
When rendering pages, any warnings will be rendered to the user."""
if args:
msg %= args
req.chrome['warnings'].append(msg)
def add_notice(req, msg, *args):
"""Add an informational notice to the request object.
When rendering pages, any notice will be rendered to the user."""
if args:
msg %= args
req.chrome['notices'].append(msg)
def add_ctxtnav(req, elm_or_label, href=None, title=None):
"""Add an entry to the current page's ctxtnav bar.
"""
if href:
elm = tag.a(elm_or_label, href=href, title=title)
else:
elm = elm_or_label
req.chrome.setdefault('ctxtnav', []).append(elm)
# ???: Does this belong in trac.util somewhere? <NPK>
def prevnext_nav(req, label, uplabel=None):
"""Add Previous/Up/Next navigation links
`req` a Request object
`label` the label to use after the Previous/Next words
`uplabel` the label to use for the Up link
"""
links = req.chrome['links']
if 'prev' not in links and \
'up' not in links and \
'next' not in links:
# Short circuit
return
if 'prev' in links:
link = links['prev'][0]
add_ctxtnav(req,
tag.span(Markup('← '),
tag.a(_('Previous %(label)s', label=label),
href=link['href'],
title=link['title'],
class_='prev'
)))
else:
add_ctxtnav(req,
tag.span(Markup('← '),
_('Previous %(label)s', label=label),
class_='missing'))
if uplabel and 'up' in links:
link = links['up'][0]
add_ctxtnav(req, tag.a(uplabel,
href=link['href'],
title=link['title']))
if 'next' in links:
link = links['next'][0]
add_ctxtnav(req,
tag.span(tag.a(_('Next %(label)s', label=label),
href=link['href'],
title=link['title'],
class_='next'),
Markup(' →')))
else:
add_ctxtnav(req,
tag.span(_('Next %(label)s', label=label),
Markup(' →'), class_='missing'))
class INavigationContributor(Interface):
"""Extension point interface for components that contribute items to the
navigation.
"""
def get_active_navigation_item(req):
"""This method is only called for the `IRequestHandler` processing the
request.
It should return the name of the navigation item that should be
highlighted as active/current.
"""
def get_navigation_items(req):
"""Should return an iterable object over the list of navigation items to
add, each being a tuple in the form (category, name, text).
"""
class ITemplateProvider(Interface):
"""Extension point interface for components that provide their own
ClearSilver templates and accompanying static resources.
"""
def get_htdocs_dirs():
"""Return a list of directories with static resources (such as style
sheets, images, etc.)
Each item in the list must be a `(prefix, abspath)` tuple. The
`prefix` part defines the path in the URL that requests to these
resources are prefixed with.
The `abspath` is the absolute path to the directory containing the
resources on the local file system.
"""
def get_templates_dirs():
"""Return a list of directories containing the provided template
files.
"""
# Mappings for removal of control characters
_translate_nop = "".join([chr(i) for i in range(256)])
_invalid_control_chars = "".join([chr(i) for i in range(32)
if i not in [0x09, 0x0a, 0x0d]])
class Chrome(Component):
"""Responsible for assembling the web site chrome, i.e. everything that
is not actual page content.
"""
implements(IEnvironmentSetupParticipant, IRequestHandler, ITemplateProvider,
IWikiSyntaxProvider)
navigation_contributors = ExtensionPoint(INavigationContributor)
template_providers = ExtensionPoint(ITemplateProvider)
stream_filters = ExtensionPoint(ITemplateStreamFilter)
shared_templates_dir = PathOption('inherit', 'templates_dir', '',
"""Path to the shared templates directory.
Templates in that directory are loaded in addition to those in the
environments `templates` directory, but the latter take precedence.
(''since 0.11'')""")
auto_reload = Option('trac', 'auto_reload', False,
"""Automatically reload template files after modification.""")
htdocs_location = Option('trac', 'htdocs_location', '',
"""Base URL of the core static resources.""")
metanav_order = ListOption('trac', 'metanav',
'login,logout,prefs,help,about', doc=
"""Order of the items to display in the `metanav` navigation bar,
listed by IDs. See also TracNavigation.""")
mainnav_order = ListOption('trac', 'mainnav',
'wiki,timeline,roadmap,browser,tickets,'
'newticket,search', doc=
"""Order of the items to display in the `mainnav` navigation bar,
listed by IDs. See also TracNavigation.""")
logo_link = Option('header_logo', 'link', '',
"""URL to link to from header logo.""")
logo_src = Option('header_logo', 'src', 'site/your_project_logo.png',
"""URL of the image to use as header logo.""")
logo_alt = Option('header_logo', 'alt',
"(please configure the [header_logo] section in trac.ini)",
"""Alternative text for the header logo.""")
logo_width = IntOption('header_logo', 'width', -1,
"""Width of the header logo image in pixels.""")
logo_height = IntOption('header_logo', 'height', -1,
"""Height of the header logo image in pixels.""")
show_email_addresses = BoolOption('trac', 'show_email_addresses', 'false',
"""Show email addresses instead of usernames. If false, we obfuscate
email addresses (''since 0.11'').""")
show_ip_addresses = BoolOption('trac', 'show_ip_addresses', 'false',
"""Show IP addresses for resource edits (e.g. wiki).
(''since 0.11.3'').""")
templates = None
# A dictionary of default context data for templates
_default_context_data = {
'_': translation._,
'all': compat.all,
'any': compat.any,
'attrgetter': compat.attrgetter,
'classes': presentation.classes,
'date': datetime.date,
'datetime': datetime.datetime,
'first_last': presentation.first_last,
'get_reporter_id': get_reporter_id,
'gettext': translation.gettext,
'group': presentation.group,
'groupby': compat.py_groupby,
'http_date': http_date,
'istext': presentation.istext,
'itemgetter': compat.itemgetter,
'javascript_quote': javascript_quote,
'ngettext': translation.ngettext,
'paginate': presentation.paginate,
'partial': partial,
'plaintext': plaintext,
'pprint': pprint.pformat,
'pretty_size': pretty_size,
'pretty_timedelta': pretty_timedelta,
'quote_plus': unicode_quote_plus,
'reversed': compat.reversed,
'separated': presentation.separated,
'shorten_line': shorten_line,
'sorted': compat.sorted,
'time': datetime.time,
'timedelta': datetime.timedelta,
'to_unicode': to_unicode,
'utc': utc,
}
def __init__(self):
import genshi
self.env.systeminfo.append(('Genshi',
get_pkginfo(genshi).get('version')))
# IEnvironmentSetupParticipant methods
def environment_created(self):
"""Create the environment templates directory."""
if self.env.path:
templates_dir = os.path.join(self.env.path, 'templates')
if not os.path.exists(templates_dir):
os.mkdir(templates_dir)
fileobj = open(os.path.join(templates_dir, 'site.html'), 'w')
try:
fileobj.write("""<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:py="http://genshi.edgewall.org/" py:strip="">
<!--! Custom match templates go here -->
</html>""")
finally:
fileobj.close()
def environment_needs_upgrade(self, db):
return False
def upgrade_environment(self, db):
pass
# IRequestHandler methods
def match_request(self, req):
match = re.match(r'/chrome/(?P<prefix>[^/]+)/+(?P<filename>.+)',
req.path_info)
if match:
req.args['prefix'] = match.group('prefix')
req.args['filename'] = match.group('filename')
return True
def process_request(self, req):
prefix = req.args['prefix']
filename = req.args['filename']
dirs = []
for provider in self.template_providers:
for dir in [os.path.normpath(dir[1]) for dir
in provider.get_htdocs_dirs() if dir[0] == prefix]:
dirs.append(dir)
path = os.path.normpath(os.path.join(dir, filename))
assert os.path.commonprefix([dir, path]) == dir
if os.path.isfile(path):
req.send_file(path, get_mimetype(path))
self.log.warning('File %s not found in any of %s', filename, dirs)
raise HTTPNotFound('File %s not found', filename)
# ITemplateProvider methods
def get_htdocs_dirs(self):
return [('common', pkg_resources.resource_filename('trac', 'htdocs')),
('site', self.env.get_htdocs_dir())]
def get_templates_dirs(self):
return filter(None, [
self.env.get_templates_dir(),
self.shared_templates_dir,
pkg_resources.resource_filename('trac', 'templates'),
])
# IWikiSyntaxProvider methods
def get_wiki_syntax(self):
return []
def get_link_resolvers(self):
yield ('htdocs', self._format_link)
def _format_link(self, formatter, ns, file, label):
file, query, fragment = formatter.split_link(file)
href = formatter.href.chrome('site', file) + query + fragment
return tag.a(label, href=href)
# Public API methods
def get_all_templates_dirs(self):
"""Return a list of the names of all known templates directories."""
dirs = []
for provider in self.template_providers:
dirs += provider.get_templates_dirs()
return dirs
def prepare_request(self, req, handler=None):
"""Prepare the basic chrome data for the request.
@param req: the request object
@param handler: the `IRequestHandler` instance that is processing the
request
"""
self.log.debug('Prepare chrome data for request')
chrome = {'links': {}, 'scripts': [], 'ctxtnav': [], 'warnings': [],
'notices': []}
# This is ugly... we can't pass the real Request object to the
# add_xxx methods, because it doesn't yet have the chrome attribute
class FakeRequest(object):
def __init__(self, req):
self.base_path = req.base_path
self.chrome = chrome
fakereq = FakeRequest(req)
htdocs_location = self.htdocs_location or req.href.chrome('common')
chrome['htdocs_location'] = htdocs_location.rstrip('/') + '/'
# HTML <head> links
add_link(fakereq, 'start', req.href.wiki())
add_link(fakereq, 'search', req.href.search())
add_link(fakereq, 'help', req.href.wiki('TracGuide'))
add_stylesheet(fakereq, 'common/css/trac.css')
add_script(fakereq, 'common/js/jquery.js')
# Only activate noConflict mode if requested to by the handler
if handler is not None and \
getattr(handler.__class__, 'jquery_noconflict', False):
add_script(fakereq, 'common/js/noconflict.js')
add_script(fakereq, 'common/js/trac.js')
add_script(fakereq, 'common/js/search.js')
# Shortcut icon
chrome['icon'] = self.get_icon_data(req)
if chrome['icon']:
src = chrome['icon']['src']
mimetype = chrome['icon']['mimetype']
add_link(fakereq, 'icon', src, mimetype=mimetype)
add_link(fakereq, 'shortcut icon', src, mimetype=mimetype)
# Logo image
chrome['logo'] = self.get_logo_data(req.href, req.abs_href)
# Navigation links
allitems = {}
active = None
for contributor in self.navigation_contributors:
for category, name, text in contributor.get_navigation_items(req):
category_section = self.config[category]
if category_section.getbool(name, True):
# the navigation item is enabled (this is the default)
item = None
if isinstance(text, Element) and text.tag.localname == 'a':
item = text
label = category_section.get(name + '.label')
href = category_section.get(name + '.href')
if href:
if href.startswith('/'):
href = req.href() + href
if label:
item = tag.a(label) # create new label
elif not item:
item = tag.a(text) # wrap old text
item = item(href=href) # use new href
elif label and item: # create new label, use old href
item = tag.a(label, href=item.attrib.get('href'))
elif not item: # use old text
item = text
allitems.setdefault(category, {})[name] = item
if contributor is handler:
active = contributor.get_active_navigation_item(req)
nav = {}
for category, items in [(k, v.items()) for k, v in allitems.items()]:
category_order = category + '_order'
if hasattr(self, category_order):
order = getattr(self, category_order)
def navcmp(x, y):
if x[0] not in order:
return int(y[0] in order)
if y[0] not in order:
return -int(x[0] in order)
return cmp(order.index(x[0]), order.index(y[0]))
items.sort(navcmp)
nav[category] = []
for name, label in items:
nav[category].append({
'name': name,
'label': label,
'active': name == active
})
chrome['nav'] = nav
# Default theme file
chrome['theme'] = 'theme.html'
return chrome
def get_icon_data(self, req):
icon = {}
icon_src = icon_abs_src = self.env.project_icon
if icon_src:
if not icon_src.startswith('/') and icon_src.find('://') == -1:
if '/' in icon_src:
icon_abs_src = req.abs_href.chrome(icon_src)
icon_src = req.href.chrome(icon_src)
else:
icon_abs_src = req.abs_href.chrome('common', icon_src)
icon_src = req.href.chrome('common', icon_src)
mimetype = get_mimetype(icon_src)
icon = {'src': icon_src, 'abs_src': icon_abs_src,
'mimetype': mimetype}
return icon
def get_logo_data(self, href, abs_href=None):
# TODO: Possibly, links to 'common/' could use chrome.htdocs_location
logo = {}
logo_src = self.logo_src
if logo_src:
abs_href = abs_href or href
if logo_src.startswith('http://') or \
logo_src.startswith('https://') or \
logo_src.startswith('/'):
# Nothing further can be calculated
logo_src_abs = logo_src
elif '/' in logo_src:
# Like 'common/trac_banner.png' or 'site/my_banner.png'
logo_src_abs = abs_href.chrome(logo_src)
logo_src = href.chrome(logo_src)
else:
# Like 'trac_banner.png'
logo_src_abs = abs_href.chrome('common', logo_src)
logo_src = href.chrome('common', logo_src)
width = self.logo_width > -1 and self.logo_width or None
height = self.logo_height > -1 and self.logo_height or None
logo = {
'link': self.logo_link, 'src': logo_src,
'src_abs': logo_src_abs, 'alt': self.logo_alt,
'width': width, 'height': height
}
else:
logo = {'link': self.logo_link, 'alt': self.logo_alt}
return logo
def populate_hdf(self, req):
"""Add chrome-related data to the HDF (deprecated)."""
req.hdf['HTTP.PathInfo'] = req.path_info
req.hdf['htdocs_location'] = req.chrome['htdocs_location']
req.hdf['chrome.href'] = req.href.chrome()
req.hdf['chrome.links'] = req.chrome['links']
req.hdf['chrome.scripts'] = req.chrome['scripts']
req.hdf['chrome.logo'] = req.chrome['logo']
for category, items in req.chrome['nav'].items():
for item in items:
prefix = 'chrome.nav.%s.%s' % (category, item['name'])
req.hdf[prefix] = item['label']
def populate_data(self, req, data):
d = self._default_context_data.copy()
d['trac'] = {
'version': VERSION,
'homepage': 'http://trac.edgewall.org/', # FIXME: use setup data
'systeminfo': self.env.systeminfo,
}
href = req and req.href
abs_href = req and req.abs_href or self.env.abs_href
admin_href = None
if self.env.project_admin_trac_url == '.':
admin_href = href
elif self.env.project_admin_trac_url:
admin_href = Href(self.env.project_admin_trac_url)
d['project'] = {
'name': self.env.project_name,
'descr': self.env.project_description,
'url': self.env.project_url,
'admin': self.env.project_admin,
'admin_href': admin_href,
'admin_trac_url': self.env.project_admin_trac_url,
}
d['chrome'] = {
'footer': Markup(self.env.project_footer)
}
if req:
d['chrome'].update(req.chrome)
else:
d['chrome'].update({
'htdocs_location': self.htdocs_location,
'logo': self.get_logo_data(self.env.abs_href),
})
show_email_addresses = (self.show_email_addresses or not req or \
'EMAIL_VIEW' in req.perm)
tzinfo = None
if req:
tzinfo = req.tz
def dateinfo(date):
return tag.span(pretty_timedelta(date),
title=format_datetime(date))
def get_rel_url(resource, **kwargs):
return get_resource_url(self.env, resource, href, **kwargs)
def get_abs_url(resource, **kwargs):
return get_resource_url(self.env, resource, abs_href, **kwargs)
d.update({
'context': req and Context.from_request(req) or None,
'url_of': get_rel_url,
'abs_url_of': get_abs_url,
'name_of': partial(get_resource_name, self.env),
'shortname_of': partial(get_resource_shortname, self.env),
'summary_of': partial(get_resource_summary, self.env),
'req': req,
'abs_href': abs_href,
'href': href,
'perm': req and req.perm,
'authname': req and req.authname or '<trac>',
'show_email_addresses': show_email_addresses,
'show_ip_addresses': self.show_ip_addresses,
'format_author': partial(self.format_author, req),
'format_emails': self.format_emails,
# Date/time formatting
'dateinfo': dateinfo,
'format_datetime': partial(format_datetime, tzinfo=tzinfo),
'format_date': partial(format_date, tzinfo=tzinfo),
'format_time': partial(format_time, tzinfo=tzinfo),
'fromtimestamp': partial(datetime.datetime.fromtimestamp,
tz=tzinfo),
# Wiki-formatting functions
'wiki_to': partial(format_to, self.env),
'wiki_to_html': partial(format_to_html, self.env),
'wiki_to_oneliner': partial(format_to_oneliner, self.env),
})
# Finally merge in the page-specific data
d.update(data)
return d
def load_template(self, filename, method=None):
"""Retrieve a Template and optionally preset the template data.
Also, if the optional `method` argument is set to `'text'`, a
TextTemplate instance will be created instead of a MarkupTemplate.
"""
if not self.templates:
self.templates = TemplateLoader(self.get_all_templates_dirs(),
auto_reload=self.auto_reload,
variable_lookup='lenient')
if method == 'text':
cls = TextTemplate
else:
cls = MarkupTemplate
return self.templates.load(filename, cls=cls)
def render_template(self, req, filename, data, content_type=None,
fragment=False):
"""Render the `filename` using the `data` for the context.
The `content_type` argument is used to choose the kind of template
used (TextTemplate if `'text/plain'`, MarkupTemplate otherwise), and
tweak the rendering process (use of XHTML Strict doctype if
`'text/html'` is given).
"""
if content_type is None:
content_type = 'text/html'
method = {'text/html': 'xhtml',
'text/plain': 'text'}.get(content_type, 'xml')
template = self.load_template(filename, method=method)
data = self.populate_data(req, data)
stream = template.generate(**data)
# Filter through ITemplateStreamFilter plugins
if self.stream_filters:
stream |= self._filter_stream(req, method, filename, stream, data)
if fragment:
return stream
if method == 'text':
buffer = cStringIO()
stream.render('text', out=buffer)
return buffer.getvalue()
doctype = {'text/html': DocType.XHTML_STRICT}.get(content_type)
if doctype:
if req.form_token:
stream |= self._add_form_token(req.form_token)
if not req.session or not int(req.session.get('accesskeys', 0)):
stream |= self._strip_accesskeys
links = req.chrome.get('links')
scripts = req.chrome.get('scripts')
req.chrome['links'] = {}
req.chrome['scripts'] = []
data.setdefault('chrome', {}).update({
'late_links': req.chrome['links'],
'late_scripts': req.chrome['scripts'],
})
try:
buffer = cStringIO()
stream.render(method, doctype=doctype, out=buffer)
return buffer.getvalue().translate(_translate_nop,
_invalid_control_chars)
except Exception, e:
# restore what may be needed by the error template
req.chrome['links'] = links
req.chrome['scripts'] = scripts
# give some hints when hitting a Genshi unicode error
if isinstance(e, UnicodeError):
pos = self._stream_location(stream)
if pos:
location = "'%s', line %s, char %s" % pos
else:
location = _("(unknown template location)")
raise TracError(_("Genshi %(error)s error while rendering "
"template %(location)s",
error=e.__class__.__name__,
location=location))
raise
# E-mail formatting utilities
def cc_list(self, cc_field):
"""Split a CC: value in a list of addresses."""
if not cc_field:
return []
return [cc.strip() for cc in cc_field.split(',') if cc]
def format_emails(self, context, value, sep=', '):
"""Normalize a list of e-mails and obfuscate them if needed.
:param context: the context in which the check for obfuscation should
be done
:param value: a string containing a comma-separated list of e-mails
:param sep: the separator to use when rendering the list again
"""
all_cc = self.cc_list(value)
if not (self.show_email_addresses or 'EMAIL_VIEW' in context.perm):
all_cc = [obfuscate_email_address(cc) for cc in all_cc]
return sep.join(all_cc)
def format_author(self, req, author):
if self.show_email_addresses or not req or 'EMAIL_VIEW' in req.perm:
return author
else:
return obfuscate_email_address(author)
# Template filters
def _add_form_token(self, token):
elem = tag.div(
tag.input(type='hidden', name='__FORM_TOKEN', value=token)
)
def _generate(stream, ctxt=None):
for kind, data, pos in stream:
if kind is START and data[0].localname == 'form' \
and data[1].get('method', '').lower() == 'post':
yield kind, data, pos
for event in elem.generate():
yield event
else:
yield kind, data, pos
return _generate
def _strip_accesskeys(self, stream, ctxt=None):
for kind, data, pos in stream:
if kind is START and 'accesskey' in data[1]:
data = data[0], Attrs([(k,v) for k,v in data[1]
if k != 'accesskey'])
yield kind, data, pos
def _filter_stream(self, req, method, filename, stream, data):
def inner(stream, ctxt=None):
for filter in self.stream_filters:
stream = filter.filter_stream(req, method, filename, stream,
data)
return stream
return inner
def _stream_location(self, stream):
for kind, data, pos in stream:
return pos